cochrane



HE. og' coc-limite, or BUFFALO, -NEW YORK; AssieNoR "rol H-'IMSELF AND.J. ewmrll, or 'run SAME-PLAGE. i

l'le'tterslat-e'nt No. 79,550, dated'vJuZy 7, 1868.

i .iiirRoVBMBrir Ink emita-FASTWEB -ron Deens;

i titte Sfigetulmfnri tu iii their gettati ntnit nit meting" mit ntniet.

To. ALL .WHOM 1r MAY ooNoERNz l Be it-known'that'I, E; C. COCIRANE, oftheeity ofBualo,-in the county-of Erie, and Sta-tc of New York, haveinvented acertain new and improved Guard-Fastener for Doors;v and Idoherleby declare that tbefollcwing is a'fulland'e'xaet descriptionthereof, reference being had to theac'eompanyirigdrawings,'in-which-f-fI lFigure I is'a.' horizontal 'section ot' a door provided with myfastener, 'representedeiu a. closedpostion. Figure II is a. similarview, with the door shown slightly open and seeuredby my improved guard.

Figures IIII and'IV are detached views of the parts that are to vheattached to thejamb and. thedoor respectively.l v I i u l' v Likeletters designate like parts in-all the figures. g *My invention isdesigned as ra substitute for the ordinary .guard-chains in usfe,'.\vhich permit only a' slight opening of the door till the device isunfastened by the person within, and is intended as a protection againstthefo'rcibleentrance of persons intoa building, when the door isunlocked in answer to 'a ring brother-sum"- mons freni Without. i' v ITheinventiori consists- Y n First, controlling the opening 4of a door bya. bracket-arm attached to the door, 'nil engaging with a rod or bar,hinged tothe jamb in'sueh'a manner that when the armshall havetraversedlthe length oi' bur, .the same will act 'as-a stop and preventthe fuithegopcnihgmf the door. n

`Second, in so constructing and connecting the'arm and rod that whenthedoorlis closed they may-bev' readily disengaged, and this only when`the door is closed'. l I 'A In the drawings,- A A' represent twosimilar plates, secured hy wood-screws respectively to the jamb orcasing and door. 'B B are arms, preferably. attached to these plates hyscrews, shanls'screwing into them, so as. to facilitate their easyremoval drtattahvment, as required. C is a bar-hinged 'to thearm B,andformed t Within.- longitifdinaltslot,"c, uhich-is enlarged nttheinnerend, as shown atI e in Fig. III.- -D is a vbolt or bar, preferablyhinged orjointed to the .endot` arm B', although it may be-rigid, andisl constructed with a head, AcZ, which will pass through the enlargedpori-ion, c', ofthe slot e,- hutwhos-e shoulders will "prevent itsWithdrawal from any other` point in-.the said slot. v y i ...The partsare attached to the door and casing, as represented, Yand ccnstructedandarranged so' that the lockingharD can bci-engaged and disengaged fromthe bar'G only when" the door, is closed, as shown in Vred lines, Fig.I'.v Y'The two being 4locked together, as shown in that gure,the-opening of the door will cause 'the lockinghar to slide to theouterend of the slot 4in-the bar D, when its further progress will hearrested,`as shoiwn in Fig. II, the width of the opening which the guardpermits being regulated by the length of the bar end slot C`e, as may herequired; I

It is4 evident that the construction of 'the bar and arm C D, lse as' topermit their engagement only when the door4 is shut, andv to allow thesliding oi' the one along the other to permit Vthe slight opening of thedoor, may he consideriihl'y varied, and -still operate on the sameprinciple and with like elect. vAs the parts G D of the guard aredisengaged in opening the door, they maybe thrown. back out of theway,as represented indotted lines. During the day, or .at any other time, ifrequired, the arms B B- can be 4-unscreived from the plates-A andremoved, with the bar ,hinged thereto, sothat nothing will remain butthe plates-A A'," which c anvbe made more orless'ornamenta'l, as may bedesired.

The advantagesof-my impro'vedvguardare the facility with which the partecan heengaged and disengaged; .the securityit affords againstbeingunlocked'whilev the door is open; and the facility `withjvfhich'it canbe detached-from thedo'or and jamh when its use is not desired.

Whitt I claim :is my invention, is- Y l 1. 'I hecpmbinationot ahingedhar attaehedto the jambyand anar-n1 `attached -t9 the door, forengagement with 'each other, siihstantall'yas and for the pur-posesetforth. i y

I j 2. The slot-c, ofthe hinged bar, enlarged at its inner end, topermit the disengagement of the arm from the rod only when the d oo'r isclosed.

l E. o; .GQGHRANEL Y Witnesses: l

W. J. CuMemriAm, j s Y; Bncxsii.-

